of the results presented together with an explanation of the mechanism of fluid hydro-fracture grouting. The actual Compensation grouting design of Contract 104 is described and some results presented.

Key words: Fracture grouting, Compensation grouting, Settlement of structures

(ii) Performance of full-depth shear keys in adjacent prestressed box beam bridges, Lall, J., Alampalli, S. and DiCocco, E. F., PCI Journal, Vol. 43, No. 2,1998, pp. 72-79.
     Bridge decks supported by adjacent precast, prestressed concrete beams have become increasingly popular in recent years due to their ease of construction, shallow superstructure, and aesthetic appeal. In New York State prior to 1992, such structures were built by placing a number of precast beams alongside one another and connecting them through 12 in. (0.305 m) deep grouted keyways called shear keys to transfer shear forces across the structure. After the grout hardens, the beams are transversely post-tensioned and a composite, cast-in-place deck is poured over them. Prompted by the frequent appearance of longitudinal deck cracking over these partial-depth shear keys soon after construction, full-depth shear keys with more transverse tendons were adopted in 1992. A follow-up study evaluated the performance of this new full-depth shear key/transverse tie system. Results indicate that this method has reduced the frequency of shear key related deck cracking.

Key words: Shear keys, Deck cracking

(i) Chemical grout stops leaks, Anon, Public Works Journal, Vol. 129, No. 8, 1998, pp. 38-40.
     Since its development in the early 1950s, chemical grout has been used to stop water movement through soils in mines, earthen dams, tunnels, and excavation sites. It is also effective in stopping leaks into buried structures. This paper presents case studies illustrating chemical grout's effectiveness in stopping leaks into or out of concrete structures, whether above or below grade.

Key words: Grouting leakage, Chemical grout

For More information on CIGMAT or comments on this issue of CIGMAT News and Literature Review, Contact;

     Dr. C. Vipulanandan (Vipu), P.E.,
     Director of CIGMAT,
     Department of Civil and Environmental Eng.
     University of Houston,
     Houston, Texas 77024-4791
     Ph. No. 713-743-4278; Fax No. 713-743-4260.
     Email: cvipulanandan@uh.edu

Journals Reviewed
The articles for inclusion in the ClGMAT News and Literature Review are selected on the basis of their usefulness and applicability in the field of grouting technology, other related topics and are geared towards practicing professionals in the field. Recent issues of the following publications were reviewed.

1. American Concrete Institute
2. Canadian Geotechnical Journal
3. Civil Engineering Magazine (ASCE)
4. Civil Engineering (London, England)
5. Civil and Structural Engineering Abstracts
6. Composite Materials Series
7. Concrete Construction
8. Concrete International (ACI)
9. Engineering News Record
10. Engineering and Mining Journal
11. Foundation Facts
12. Geodex Retrieval System for Geotechnical Abstracts
13. Geotechnical Abstracts
14.Geotechnique
15. International Journal of Rock Mechanics and Mining
       Sciences and Geomechanics Abstracts.
16. Japan Society of Civil Engineers.
17. Journal of Geotechnical Engineering and
      Geoenvironmental(ASCE)
18. Journal of Structural Engineering (ASCE)
19. Journal of Protective Coatings and Linings.
20. Materials Performance
21. New Scientist
22. Pipes and Pipelines Manual
23. Pipes and Pipelines International
24. Pipelines and Utilities Construction
25. Rock Mechanics and Rock Engineering
26. Series on Rock and Soil Mechanics
27. Soils and Foundations
28. Soil Technology
29. Trenchless Technology Magazine
30. Tunnelling and Underground Space Technology
31. Waste Management